National WQD201W Intercom Master Unit Only Replaced due to a faulty entrance unit. It was working normally until removal, but is currently untested and sold as junk. No returns or refunds. - Brand: National - Model: WQD201W - Country of Manufacture: Japan - Power Supply: AC100V - Power Consumption: 6W - Size: Approximately 20.5 x 15.5 cm Thank you for viewing.